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  1. H

    Need Help with Maths [Functions & Trigonometry]

    6(i) First, we list out what forces are involved in this question. We got tension and applied force (5N). Since tension came from a same string, the tension is equal. Remember, the system is in equilibrium so the resultant force is equal to 0. So, in the x-direction: 5cos(0) - T(cos 60) -...
  2. H

    Need Help with Maths [Functions & Trigonometry]

    Assuming that the tension made by object P goes to the east direction and tension made by object Q goes to the south direction. Logic dictates that the resultant of both tensions will go somewhere to the south-east direction (assuming the only forces that applies onto the pulley is the...
  3. H

    Need Help with Maths [Functions & Trigonometry]

    Let square root = | 4|2 is the resultant of the two tensions (tension made by Q and made by P), note that the two tensions are equal in magnitude. so (4|2)^2= T^2 +T^2 32=2T^2 T=4N Assuming Q is in equillibrium, mg - 4 = 0 (where g=10) m = 0.4 kg.
  4. H

    Need Help with Maths [Functions & Trigonometry]

    thank you so much :)
  5. H

    Need Help with Maths [Functions & Trigonometry]

    Hello, I need help for this question in Nov 2001 P1 Q3, I'm trying really hard to think of the solution but to no avail. Can someone please thoroughly explain this to me: Given that f(x)=cos x, for the domain 0=<x=<k, find the largest value of k for which f has an inverse.
  6. H

    Chemistry Question

    My earlier answer is incorrect, It should be 267. The start codon codes for an amino acid which is methionine. When the polypeptide chain reaches it stop codon, It simply stops and does not code for an amino acid. The question asks for the amount of bases needed to produce the sequence, So the...
  7. H

    Chemistry Question

    I think the answer is 264 bases. Since, 88 amino acids x 3 bases for each codon = 264 bases. 1 amino acid = 1 anti-codon (from tRNA which have 3 bases) + 1 codon (from mRNA which have 3 complementary bases to tRNA)
  8. H

    May/June 2012 Question Papers + Marking Schemes + Examiner Reports + Grade Thresholds

    Can you upload Question Papers on Biology (9700), Mathematics (9709) and General Paper (8004)?
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